adev->external_rev_id = adev->rev_id + 0x14;
                break;
        case CHIP_VEGA20:
-               adev->cg_flags = 0;
+               adev->cg_flags = AMD_CG_SUPPORT_GFX_MGCG |
+                       AMD_CG_SUPPORT_GFX_MGLS |
+                       AMD_CG_SUPPORT_GFX_CGCG |
+                       AMD_CG_SUPPORT_GFX_CGLS |
+                       AMD_CG_SUPPORT_GFX_3D_CGCG |
+                       AMD_CG_SUPPORT_GFX_3D_CGLS |
+                       AMD_CG_SUPPORT_GFX_CP_LS |
+                       AMD_CG_SUPPORT_MC_LS |
+                       AMD_CG_SUPPORT_MC_MGCG |
+                       AMD_CG_SUPPORT_SDMA_MGCG |
+                       AMD_CG_SUPPORT_SDMA_LS |
+                       AMD_CG_SUPPORT_BIF_MGCG |
+                       AMD_CG_SUPPORT_BIF_LS |
+                       AMD_CG_SUPPORT_HDP_MGCG |
+                       AMD_CG_SUPPORT_ROM_MGCG |
+                       AMD_CG_SUPPORT_VCE_MGCG |
+                       AMD_CG_SUPPORT_UVD_MGCG;
                adev->pg_flags = 0;
                adev->external_rev_id = adev->rev_id + 0x28;
                break;